Swimming Pool Volume Calculator
Estimate a rectangular pool’s water volume in cubic meters, liters, and US gallons using average depth.
Your result
Review your calculated values below.
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Choose Calculate to see your result.
How to use this calculator
- Enter your values in the labeled fields, keeping the displayed units.
- Choose Calculate or press Enter in a single-line field.
- Review the result and the assumptions below before using it.
Formula and method
Average depth = (shallow depth + deep depth) / 2. Volume = length × width × average depth.
Worked example
An 8 m × 4 m pool with water depths of 1 m and 2 m holds approximately 48 m³, or 48,000 liters.
What the result assumes
Assumes a rectangular pool with a uniformly sloping floor. Steps, benches, curves, and uneven slopes change the actual capacity.
Common question
Should I enter wall height or water depth?
Use actual water depth at each end, measured from the floor to the water surface.